What you are trying to create already exists and is called either ESWC , dreamhack , All stars or the challenges that in any comic con or gatherings alike and you are just trying to reinvent the wheel while doing this project , even the gambling idea about such people does already exists and lots of either bitcoin or fiat casinos has integrated such bets in their lists .
Such sports are highly penetrable by people that want to change the result of such games for their own profit though and any team that lacks sponsors or funding will be happily accepting a 100k dollars deal to loose a certain game over winning it and loosing the next one and getting out of the competition empty pocketed ..